Shoe toe lining trimming machine



Jan. 22, 1952 J. M. EwARr ETAL SHOE TOE LINING TRIMMING MACHINE 7Sheets-Sheet l Filed June 20, 1950 w Invenars John/Ewar Les r 5. Nacdo770/0 Jan. 22, 1952 M EWART ErAL 2,582,975

SHOE TOE LINING TRIMMING MACHINE Filed June 20, 1950 7 Sheets-Sheet 2Jan- 22. 1952 J. M. EWART Erm. 2,582,975

sHoE Tos LINING TRIMMING MACHINE med June 2o, 195o l v sheets-sheet sInventors Les fer 6. /Vacdona/a By /:eir Attorney Jan. 22, 1952 1 MEWART ErAL 2,582,975V

SHOE TOE LINING TRIMMING MACHINE I Filed June 20, 1950 7 Sheets-Sheet 4Inventors Ifo/m N. .Ewclr Leser 5. Macdona/o By #1e/r /tor'ney Jan. 22,1952 J. M. EwART ETAL SHOE TOE LINING TRIMMING MACHINE 7 Sheets-Sheet 5Filed June 20. 1950 fnvenors John M 1-warf '7 Sheets-Sheet 6 J. M.EWART' ETAL SHOE TOE LINING TRIMMING MACHINE Jan. 22, 1952 Fiied June2o, 195o 7 Sheets-Sheet 7 Jan. 22, 1952 J. M. EwART ErAL sHoE ToraLINING TRIMMING MACHINE Filed June 20, 1950 In 'uen fors Ifo/m /7. warIPatented Jan. 22, -1952 SHOE TOE LINING TRIMIIING MACHINE John M. Ewartand Lester S. Macdonald, Beverly, Mass., assignors to United ShoeMachinery Corporation, Flemington, N. J., a corporation oi' New JerseyApplication June 20, 1950, Serial No. 169,188

9 Claims.

'Ihis invention relates to machines for trimming the lasting margin ofthe lining at the toe end of a partially fabricated shoe, an operationusually performed after the sides of the shoe have been lasted and inpreparation for the lasting of the toe portion. A trimming machineembodying the present invention is accordingly to be used on shoes ofthe McKay or other types in which the lasting margins at the toe, aftersatisfying pulling-over requirements, need to be reduced in width andbulk.

Trimming of these toe margins eliminates a fabric surplus which, if notsevered properly, would be unevenly distributed and creased during toelasting to prevent securing the smooth and neatly finished appearancethat is desired. Generally the plane of the trimming is preferablyspaced heightwise of the plane of the toe of the insole by approximatelythe thickness of the upper. In addition to leaving a rather uniformmargin by means of clean cutting, it is important that the trimming bandextend rearwardly nearly to the endmost side lasting fastenings so as toavoid producing folds which would bulge in those areas of the finishedshoe.

The outer layer of shoe material at the toe end, commonly of upperleather, will hereinafter be referred to as upper, and the term lining"will, for convenience, be used to refer collectively to the layersbacking the upper, these layers citen including what is normally termedlining plus the intermediate doubler and stii box toe.

It is an object of the present invention to provide an improved trimmingmachine for rapidly performing the described severing in an entirelysatisfactory manner on a partially fabricated shoe in bottom-downposition, which machine shall be of relatively simple construction andeasily operable.

To the accomplishment of this objective, and in accordance with onefeature of the invention, there are provided means for clamping thestrip of lining to be trimmed, a member engageable with the bottom ofthe shoe to support its toe portion, and a cutter carriage having afulcrum cooperative with said member whereby the shoe may be rockedheightwise of said means to tension the upper and lining against the toeportion of the last while the trimming knife severs the clamped strip.

Another feature of the invention resides in the anism engageable withthe shoe bottom fcrepart.

These and other features of the invention including novel arrangementsof parts will now be described in detail in connection with a preferredillustrative embodimenttherecf, reference being had to the accompanyingdrawings, in which:

Fig. 1 is a left-hand side elevation of a machine in which the inventionis embodied, portions of the stand and treadle connections being brokenaway; I

Fig. 2 is an enlarged sectional view of the operating portion of themachine as seen in Fig. 1, the section being taken along thelongitudinal center line, and a shoebeing shown in initial operatingposition;

Fig. 3 is a sectional view similar to Fig. 2 but further enlarged andindicating the shoe and the machine in a subsequent stage of thetrimming operation;

Fig. 4 is a plan view of the operating portions of the machine;

Fig. 5 is a continuation of Fig. 4 and shows portions of the drivemechanism;

Fig. 6 is a perspective of spreaders and plow shown in Fig. 4;

Fig. 7 is a plan view of a portion of the mechanism viewed in Fig. 4,the elements of Fig. 6, and other elements and wiping mechanism beingomitted for clarity;

Fig. 8 is an enlarged plan of a portion of the machine operating on anunlasted, spread toe margin;

Fig. 9 is an inverted plan of a portion of the work in position fortrimming;

Fig. 10 is an enlarged horizontal section of cutter clamping mechanismshown in Figs. 1, 2. and 3;

Fig. 11 is an exploded view, in perspective, of adjusting mechanismsshown in Fig. 4';

Fig. 12 is a perspective of a shoe forepart prior to having its toetrimmed by the illustrative machine; and

Fig. 13 is a perspective similar to Fig. 12 showing the forepart afterit has been trimmed in this machine.

The machine comprises a main frame l0 (Fig. 1) iixedly mounted on astand I2 or any preferred stationary supporting means of convenientheight. A pair of oppositely disposed bracket portions I4 of the frameI0 extend upward therefrom and are bridged by a horizontal U-shapedshearing bed member I6 detachably secured thereto as by bolts I1 (Figs.4 and 8). A cutter carriage I8 is arranged for movement forwardly andrearwardly between the portions I4 and beneath the member IE togetherwith several work engaging elements hereinafter to be described. Thecarriage I8 supports, by means of stud bearings, eight rollers 20 (onlythe four on one side being shown in Fig. 1) four being in engagementwith the upper and four with the lower sides of a horizontal guide plate22 extending from the For enabling an operator conveniently to posi--tion the shoe relatively to the operating instrumentalities a toeabutment 24 (Figs. 1, 2, and 3) is mounted for adjustment toward or fromthe shearing plane of the member I6, the latter supporting a block 28having an inclined bore threaded to receive a knurl-headed shank 28 ofthe abutment 24. A heel rest 38 at the front of the machine includes asplit clamp 32 integral with the frame I8, a vertically adjustableclevis 84 supported thereby and a T-shaped member 86 adjustably heldbysaid clevis for engagement with the rearward portion of a shoe bottom.

A pair of upright members 38 afiixed to the front of the frame I8 arebored to receive a pin 48 on which a slightly resilient and tongue-likeinsole toe support 42 is pivotally mounted and normally extends over thecutter carriage I8 t0- ward the shearing bed member I8.

Wipers 44 and 46 (Figs. 4, 8, and 8) are dat segmental plates arrangedfor movement widthwise of the member |6 and occupy recesses formedtransversely in its lower face. The lower surface of these wipers 44 and46, together with that face, constitute the smooth shearing bed againstwhich the toe portion of an upper is to be spread as will be described.The wipers 44, 46 are each provided with a guide slot 48 for receivingone of the bolts |1, and the adjacent ends of the wipers are curvedtoward one another to provide a formation adapted to accommodate the toeend of a shoe. Ears 58, 52 (Figs. 8 and 9) respectively project from thewipers 44, 46 and, when the latter are suitably moved, are engageablewith the bottom of a lasted shoe at its marginal portions. A

For moving the wipers 44 and 46 toward one another for a purpose laterto be explained, the cutter carriage I8 is provided with oppositelydisposed cam slots 54, 56 in which cam followers 58, 68 are respectivelylocated. Since adjusting and actuating means for both wipers aresimilar, only the arrangement relating to wiper 44, cam 54, follower 58,and associated parts (as shown in Figs. 4 and 11) will be described. Thefollower 58 is rotatably mounted on a shank 59 threaded into thebifurcated end of a member -62 and the latter is provided with acylindrical leg internally threaded to receive an adjusting screw 64. Asleeve 65 receives the leg telescopically and is pinned againsttelescopic movement with respect to the screw 64. An element 66 has anelongated slot 61 for receiving the shank 58 and is movable in a mortiseformed longitudinally in the sleeve 65. A vertical cylindrical portion68 of the element 66 is pivotally mounted on a hinge pin 18 supported bythe bracket I4. Turning the screw 64 accordingly is effective toposition the shank 58 in the slot 61 and thus changes the distancebetween the axis of the follower 58 and the hinge pin 18. An arm 14 alsopivotally mounted on the pin 18 and integral with the cylindricalportion 68 carries in an elongated slot 16 a roller 18 having its studbearing secured to the wiper 44 as by a nut 80. The screws 64 will bothbe turned appropriately to adjust the degree of swing imparted to thearms 14, respectively, and hence control the extent of widthwise closingmovement of the wipers 44, 46.

A pair of work spreading member 82, 84 (Figs. 2, 3, 4, and 6) arerespectively supported for horlzontal pivotal movement on a pair of pins86 secured to the front of a generally iiat plate 88.

The plate 88 has adepending cylindrical projecttion 88 received by thecarriage I8. A pin 88 ailixed in this projection extends into a slot 82formed in the carriage I8. Three compression springs 84 fitted inrecesses of the carriage I8 urge the plate 88 upwardly, its lower limitbeing determined by the pin 88 and slot 82, and its upper limit by theheightwise adjustment afforded by a screw 88 threaded into saidprojection and having its head engaging shoulders of the carriage I8. Araised portion 88 oi' the plate 88 (Fig. 6) constitutes a fiat symmetricplow having a protruding nose portion adapted to underlie even thenarrowed widths of toe portions. Each oi' the spreaders 82, 84 has araised lip portion |88 engageable with the work and corresponding incontour with its side of the plow 88.

For moving the spreaders 82, 84 apart each is provided with a roll |82that engages the walls of cam slots |84, |86 (Fig. 4) formed in levers|88, ||8 respectively. These levers are fulcrumed on pins ||2respectively mounted on a rearward raised portion .of the frame I0.Rolls II4, ||4 (Figs. 4 and 7) respectively depend from the forward endsof the levers |88, ||8 and ride in opposite sides of a V-shaped camtrack ||8 secured to the carriage I8.

The preferred trimming tool ||8 is a slightly dished rotary disc type ofknife (Figs. l, 2, 3, and 4) mounted centrally on the carriage I8 andhaving its circular cutting edge arranged in shearing relation with thelower face of the cutting bed member I6. The cutting edge issubstantially concentric with the trailing edge of the plow 88. Thediameter of the knife I I8 is preferably equal to the widthwisedimension of the largest toe portion to be operated upon. A flat annularband |28 circumscribed by the cutting edge is helpful in partiallysupporting a shoe during the trimming operation. The knife ||8 issecured to the upper end of a vertical shaft |22 by means of a screw|24, and a pin |26 projecting into the knife ||8 from a flange of theshaft |22 locks the latter against rotation relatively to the 45 knife||8. 'I'he shaft |22 is rotatable in a sleeve bearing |28 journaled inthe carriage I8. Means are provided to adjust the knife I8 heightwise ofthe shearing plane of the member I6 and wipers 44, 46 so as toaccommodate different thicknesses 50 of upper. Thus, as shown in Fig.10, a' pair of clamping members |38 slidable within a bore of thecarriage I8 engage opposite portions of the bearing |28. A bolt |82threaded into one of the members |38 will, when turned, move the mem- 55bers |38 into and out of clamping relation with the bearing |28 tosupport the knife heightwise as desired. For purposes hereinafter to bedescribed a pinion gear |34 is affixed to the lower end of the shaft|22, being held thereon by a collar and pin |36. The teeth of this gear|34 are arranged to mesh with those of a horizontal rack |38 xedlysecured within a slot of the guide plate 22 by screws-|38. Alsorotatably mounted on the carriage I8 but arranged to follow in theoperative path of the knife I I8 during a toe trimming operation is aprojection preferably in the form of a fulcrum roll |48 (Figs. l, 2, 3,and 4). The roll |48 is horizontally disposed with its perimeterextending somewhat above the shear- 70 ing level of the knife II8 andarranged to be progressively engageable with the tongue-like toe support42.

Power means for operating the machine comprises a motor |42 (Fig. 1)bolted to the stand I2, 76 a drive belt |44. and a pulley |46 driventhereby and mounted on a drive shaft |48. The latter is supported inbearings |50 bolted to a rear extension ofgthe stand |2. Crank arms |52(Fig. 5) are respectively secured to the ends of the shaft |48 and eachcarries a ball bearing |54. Connectlng rods |56, |58 are provided withsockets to receive the bearings |54 and also respectively to receiveball pins |60, |62. The latter are respectively afiixed by pins |34, |66(Fig. 4) to guide rods |68, |10 which are slidably mounted in blockbearings |12, |12 secured to the stand l2. The rods |68. |10 also extendthrough sleeve bearings |14, |14 respectively integral with the bracketportion |4 and their forward ends are bridged by a cross member |16secured thereto by pins |18, |18, said cross member being affixed to afront portion of the carriage |8.

While the motor |42 is normally in continuous operation, a singlerevolution (in the direction shown by the arrow in Fig. 1) of the driveshaft |48 is utilized to move the carriage |0 through a trimming strokerelative to the shearing bed member I6 and back to the initial startingposition shown in Fig. 1. Accordingly, a single revolution clutchmechanism of conventional design is provided and will be brieflydescribed with reference to Figs. 1 and 5. A hub |80 having peripherallyspaced blocks |82 aiiixed therein is normally freely revolvable with thepulley |46 and is backed by one of the bearings |50. A collar |84aflixed to the shaft |48 by a pin |86 is bored slidably to receive ashank portion |88 of a clutch cam |90. The shank |88 may extend betweentwo blocks |82 and has a bore across which a pin |92 extends. Acompression spring |94 within said bore bears on the collar |84 andagainst the pin |92 to urge the shank |88 into a recess between theblocks |82. A clutch pin |96, treadle-operated as will be described,normally is in raised position as seen in Fig. wherein it engages theclutch cam |90vto hold the shank |88 out of driving engagement with theblocks |82. When depressed, however, the clutch pin |96 permits thespring |94 to move the shank |88 into driving relation between theblocks |82. On being raised again the pin |96 engages the cam |90 toshift the shank portion |88 out of driving engagement, and a key |98axially slidable in the collar |84 under the inuence of a cushioningspring 200 serves to hold the clutch pin in steady engagement with thecam |90.

'I 'he clutch pin |96 extends through the stand |2 (Fig. 1) and isprovided with a. spring 202, an adjacent xed collar 204 and a fixedcollar 206. Above the spring 202 the clutch pin |96 is received by abracket portion of one of the bearings |50, said portion serving tolimit down movement of a stop 201 secured to the clutch pin. A rod 208supported by the stand l2 serves as fulcrum for a bell crank 2|0, onearm of which extends between the collars 204 and 206 for connection withthe pin |96. The bell crank 2|0 is actuated to raise or lower the pin|96 by a series of connecting members including a lever 2|2, bell crank2|4, treadle rods 2|6 and treadle 2 |8. A tension spring 220 having oneend affixed to the stand I2 is connected to the rods 2|6 so as toyieldingly support the treadle 2|8 in a normally inoperative position.Y

By means now to be described, the clutch pin |96 is yieldingly returnedto its upper or starting position when a cycle has been started. Apin222 (Figs. 1 and 5) afxed in an arm of the bell crank 2|0 is arranged tobe accommodated by a. notch formedinthe lever 2|2. A bifurcated link 224pivotally connected to one of the bearings |54 has elongated slots 226for receiving a stud 228 mounted on the lever 2|2. A tension spring 230(Fig. 1) connects the lever 2|2 and the bell crank 2|0. After the bellcrank 2|0 and the lever 2|2 have been actuated against the resistance ofthe spring 230 to start the cycle, the stud 228 will be lifted byengagement with the lower ends of the slots 226, the link 224 beingswung by a crank arm |52. The lever 2|2 is consequently raised to freeits notch from the pin 222 and thereby permits the spring 230 to rockthe bell crank 2|0 and raise the clutch pin |98 against the resistanceof the spring 202.

To start the machine on its trimming cycle the operator will trip theclutch mechanism by momentarily stepping on the treadle 2|8. 'I'heresultant motion of the clutch pin |98 permits a single revolution ofthe shaft |48 as described and, by means of moving in phase the crankarms |52, connecting rods |56, |58, and guide rods |68, |10, the cuttercarriage |8 is moved toward and then away from the shearing bed memberI6. During its movement of translation with the carriage |8, thetrimming knife ||8 is also rotated in the shearing plane by reason ofrelative movement of the pinion |34 and rack |38 thereby effecting adraw cut on the work as well as shearing action.

Before the knife ||8 engages the work, however, the power means areoperative properly to position the unsecured material against theshearing bed. As the carriage |8 advances with the plate 88, the camtracks ||6 swing the arms |08, ||0 apart and they in turn respectivelyoperate to move the spreaders 82, 84 widthwise of the toe. As aconsequence, the lips |00 of these spreaders are moved outwardly, i. e.,from their positions as shown in Fig. 4 to those shown in Fig. 8, toprogressively spread and atten the work against the shearing bed asshown in Fig. 9. The springs 94 yieldingly urge both the lips |00 andthe closely following plow 98 upward, thereby smoothing and clamping thelining against the shearing bed and just ahead of the oncoming knife||8.

At the start of this spreading action the wipers 44, 46, selected andsuitably adjusted to conform with the toe contours to be trimmed, areactuated by the carriage motion to close about the toe as seen in Figs.8 and 9. They thus advantageously hold the stock in close contact withthe last and the toe perimeter of the insole, and the ears 50, 52 serveevenly to fold the surplus material close to the endmost side lastingfasteners inserted in the lasting margins. As the knife ||8 advances,the fulcrum roll |40 pushes upwardly on the toe support 42 (Fig. 3) andthereby causes the last yieldingly to tension the clamped lining andupper downwardly over the toe contour. To maintain this tension duringtrimming, which is desirable in order to obtain lining severance along aline close to the insole proille, an operator will prevent the shoe fromrising off the heel support 36 by bearing down somewhat lon the thesurplus lining, which was allowed to fall away from the knife Ill uponseverance. has' been trimmed so that but little lining extends from theinsole in the vicinity of the endmost side lasting fasteners and only tothe extent of the thickness of the upper, approximately. around theperimeter of the toe, thereby providing an excellent condition for toelasting.

Having described our invention, what we claim as new and desire tosecure by Letters Patent of the United States is:

l. A machine for trimming surplus lining from the unlasted toe of apartial] fabricated shoe in bottom-down position, comprising a shearingbed, said bed including movable wipers cooperative to receive theperimeter of the toe, a carriage movable toward and from the bed, acircular knife mounted on the carriage for rotation in a planesubstantially parallel with that of the shearing bed, lining spreadingmembers yieldably mounted on the carriage to engage the unlasted marginahead of the knife, and means foi` moving the carriage, said means beingeffective to rotate the knife and operate said wipers and spreadingmembers.

2. A machine for trimming unlasted marginal toe material comprising ashearing bed including cooperative wipers engageable with the upper atthe toe, a carriage movable relatively to said bed and having membersarranged to spread the unsecured toe lining thereon, a rotary knifemounted on the carriage to follow said members in shearing relation tothe spread lining, the knife being spaced heightwise from said bed bythe thickness of the upper. and means for moving said carriage, saidmeans serving to close said wipers on the upper about the toe andoperate said members.

3. A trimming machine comprising a frame, shoe engaging means mounted onthe frame' including a at insole supporting member, a rcarriage guidedfor movement relative to said means by said frame, clamping meansmounted on the carriage and arranged to clamp a strip of liningprojecting from the toe portion of the insole, a knife mounted on thecarriage and having a cutting edge adapted to sever the clamped strip,said member being movable heightwise of the shoe engaging means by saidcarriage to tension the clamped strip to be severed.

4. In an upper trimming machine having a frame, mechanism for moving acutter carriage movable with respect to the frame and in' shearingrelation to a toe receiving member, means mounted on the carriage forclamping the marsin of the upper to be trimmed, an insole supportingmember engageable with the toe portion. l

and a fulcrum mounted on the carriage to move the insole supportingmember heightwise of the toe receiving member during operative movementof the carriage, whereby the clamped marginal material is tensionedbefore being shorn.

5. A machine for trimming the marginal toe portion of a partiallyfabricated shoe comprising a frame, a toe receiving shearing bed mountedon the frame, a trimming knife rotatable in shearing relation to thebed, a carriage guided by the frame for movement with the knife towardand from the bed, means operated by said carriage for spreading andclamping the marginal toe portion outwardly on the bed, and a membermoved by the carriage into engagement with the toe portion of the shoebottom for tensioning the margin to be trimmed.

6. A machine for severing surplus marginal toe material from a shoe.comprising ashearing member including wipers movable wiutnwise of thetoe'portion to engage the upper, an insole support, a carriage movablewith respect to the insole support, a trimming knife carried bythecarriage beneath said support and into and out of shearing relation withsaid member, spreaders progressively engageable with the marginal toelining, and mechanism operable by movement of the kinfe into saidshearing relation and in advance thereof to close said wipers andoperate said spreaders.

'7. In a machine for trimming surplus toe material, a cutter carriage, atoe receiving bed, trimming means movable by the carriage into shearingrelation with said toe receiving bed, and means operated by the carriagefor tensioning the unsecured toe upper and lining against said bed inadvance of shearing action by the trimming means, said tensioning meansincluding inwardly movable wipers engageable with the toe upper,outwardly movable spreaders engageable with the toe lining, and meansfor moving the toe por tion of the insole heightwise of said bed as the'trimming means advances.

8. In a machine for trimming surplus marginal material from the toe of ashoe on a last having a frame, a shearing bed supported thereby andhaving a portion conforming with said toe, a carriage reciprocablymounted on the frame, a circular knife borne by the carriage intoshearing relation with said bed, a flat insole supporting memberpivotally mounted on the frame and extending above the knife and towardthe bed, means operable by the carriage to spread the marginal materialahead of the knife, wiping means operable by the carriage to restrainupper material adjacent the perimeter of the toe of the insole, andmeans on the carriage engageable with said insole supporting member totension the upper over the toe portion of said last before the knifeshears said marginal material.

9. A trimming machine for operating on marginal toe material of shoes inbottom-down position comprising a shearing bed, said bed includingwipers cooperatively movable to embrace a toe portion at its perimeter,means movable transversely of said perimeter to hold the work marginsspread outwardly against the underside of the bed, a tongue-like membermounted for pivotal movement about a horizontal axis and extendinglengthwise of the shoe, said member being adapted to engage the insoleat the toe portion, trimming means movable beneath said toe portionengaging member andjin shearing relation to the bed, and means operativeby advancement of the trimming means to raise said member relatively tothe path of the trimming means whereby the shoe bottom is urgedheightwise to tension the upper material being trimmed.

JOHN M. EWART. LESTER. S. MACDONALD.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,680,384 Jorgensen Aug. 14, 19282,199,512 Roberts May 7, 1940 2,466,798 Elliott et al Apr. 12, 1949FOREIGN PATENTS Number Country Date 110,378 Australia Apr. 15, 1940

